period 4 - Forces Review

Front

What is Newton's Third Law of Motion?

Back

For every action, there is an equal and opposite reaction.

Front

Define force.

Back

A push or pull on an object resulting from the object's interaction with another object.

Front

What is the reaction force when a swimmer pushes water backward?

Back

The swimmer moves forward.

Front

What happens when a bird pushes air downward with its wings?

Back

The air pushes the bird upward.

Front

What is friction?

Back

A force that opposes the motion of an object and can cause the object to slow down or stop.

Front

What is the reaction force when a person sits on a chair?

Back

The chair exerts a force on the person upward.

Front

What is the relationship between action and reaction forces?

Back

They are equal in size and opposite in direction.

Front

What is an example of a contact force?

Back

Friction, tension, and normal force.

Front

What is an example of a non-contact force?

Back

Gravity, magnetic force, and electric force.

Front

How does gravity affect objects on Earth?

Back

It pulls objects toward the center of the Earth.